Figure REF  shows the peak throughput
of accessing host memory and SoC memory via SNIC
with the increase of address ranges.Note that
we attach Bluefield to CLI machines for the evaluation because we are unable to
disable DDIO on the SRV machines.
For WRITE,
the throughput of SNIC ➁ using SoC cores
drops to 22.7 M reqs/s (rom 77.9 M reqs/s)
when address range decreases to 48 KB (from 1.5 KB).
In contrast, the performance of SNIC ➁ using Host CPU cores
is hardly affected when DDIO is enabled.
For READ, the degradation is relatively smaller.
the throughput of SNIC ➁ drops from 85 M reqs/s to 50 M reqs/s
when decreasing the range from 48 KB to 1.5 KB.
This is because
DRAM can serve reads faster than writes [1]}, [2]}.
<FIGURE><FIGURE>